Why am I not able to win the Orania Map ?

[Graeme Dice]

Turmoil: 1

Never take turmoil unless your theme requires it. Similarly, do not take restless worshippers.

Growth: 3 (More people = more money = more troops, temples etc. Besides I like the thought of an empire of life as counterpart to Ermor)

Growth provides little to no benefit in the unmodded game unless you plan to play for several hundred turns. Order 3 provides a far greater boost to income.

But even relatively small armies ofJotunheim were able to defeat local defenfes of 25 ord annihilate mercenary bands.

Besides that the strength of local defences in the nortwest had become up to 80 and 90 to counter the amassing of C´tis troops.

These are mistakes. You spent hundreds or thousands of gold on province defense instead of building a castle or buying mobile troops with greater combat effectiveness.